Fiber-reinforced concrete is a promising type of concrete, which in the near future may take a fairly large share in the total volume of concrete produced. Dispersed reinforcement fibers are a versatile material that can be introduced into various types of concrete. This additive may later be as common as plasticizers for modern concrete mixes. Fibro fibers can be used for the production of concrete products in stationary reinforced concrete plants or on-site installations for the production of ready-mixed concrete. The paper examines the influence of parameters on the index of bending strength of the material, as the main one, which is aimed at the introduction of fiber. The results of the influence of the characteristics of dispersed reinforcement on the effectiveness of the introduction of these additives and the final construction and strength properties of heavy concrete are described.

Keywords: dispersed reinforcement, basalt fiber, polypropylene fiber, fiber concrete, prismatic strength, Flexural strength

Geopolymers are a promising building material that can become an alternative to Portland cement. They are distinguished by the possibility of using industrial waste, in particular metallurgical slags as well as inexpensive liquid glass. These resource-efficient binders can be used for the production of concrete products in stationary factories or workshops. The paper provides general directions for regulating the structure formation and properties of geopolymers based on metallurgical slags mixed with activators. The mechanism of geopolymer hardening based on the interaction of non-active slag components with an alkaline activator is briefly described; it is a three-stage physical and chemical process that leads to the formation of a solid stone structure. The influence of raw material properties on the final product characteristics is described.

Keywords: geopolymer, geopolymer concrete, aluminosilicate component, alkaline activator, metallurgical slag, basicity modulus, strength